Molding-machine.



PATENTED MAY 22, 1906. G. P. WHITE. MOLDING MACHINE.

APPLICATION FILED AUG. 19, 1905.

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APPLICATION FILED 'AUG. 19, 1905.

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PATENTED MAY 22, 1906.

G. P. WHITE. MOLDING MACHINE. APPLICATION FILED AUG. 19, 1995.

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PATENTED MAY 22, 1906.

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PATENT OFFICE.

GEORGE PATCHETT WHITE, OF WALLACE, IDAHO.

MOLDING-MACHINE.

Specification of Letters Patent.

Lra'tenteoi May 22, 1906.

Application filed August 19, 1905- Serial No. 274,925.

To aZZ whom it may concern.-

Be it known that I, GEORGE PAronETT WHITE, a citizen of the UnitedStates, and a 1 description.

My invention relates to a machine for molding concrete blocks of alldescriptions such as building-blocks, foundations, chimney-flues,flooring, and the likeand, in fact, for molding any articles which canbe made of plastic materials.

The invention has for a general object the location of the several partsof a press in such convenient positions as to enable the operator toproduce molded articles with the greatest convenience and speed and toremove them from the machine in a ready and eiiicient manner.

Further objects of the invention relating in a large measure to thegeneral object mentioned above will appear below.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a plan of a machine embodying the principle of my invention.Fig. 2 is a sectional view on the line 2 2 of Fig. 1, showing the partsin the position occupied when the mold has been filled with plasticmaterial. Fig. 3 is a sectional view on the same line, showing the partsin the position occupied after the plastic material has been compressed.Fig. 4 is a sectional view on the line 4 4 of Fig. 1. Fig. 5 is an endelevation of the mold shown in the other views. Fig. 6 is a sideelevation of the same. Fig. 7 is a sectional view on the line 7 7 ofFig. 8, showing a means of operating the machine by power; and Fig. 8 isa sectional view on the line 8 8 of Fig. 7.

The machine is preferably supported by a series of standards or pillars10, which may be formed of concrete or similar material. Two of thesepillars support chairs 11, each having a bearing 12 for receiving alongitudinal rod 13. There are two of these rods on each side of themachine, one above the other, the upper one not being directly connectedwith the chairs 11. These rods are connected together by heads 14,mounted on their opposite ends and secured to the rods by nuts 15 inadjusted positions. The chairs 11 are provided with projections 16,which support a pair of upright bars 17, these bars being supported alsoat one end by the other pillars 10. These parts constitute the mainsupporting-frame for the 'machlne. They also constitute supports for amold 18, which will now be described.

The mold is provided with trunnions 19 on its opposite ends, mounted offcenter, so as to balance the mold when filled. These trunnions aremounted to turn in a frame 20, which projects over the bar 17 and issupported thereby. One of the trunnions is provided with a stud 21, withwhich a handle -mold. One of the bars 17 is provided with a perforation23 for receiving this stud.

In order to provide for holding the mold in any desired position aboutits axis, one end thereof is provided with a circular ledge 24, havingrecesses 25 for the reception of a pin 26'. This pin is normally pressedagainst the ledge or into a recess by a spring 27, and a knee-lever 28is provided for moving the pin out of the recess and allowing the moldto be turned. The mold is intended to be used with a pallet 29 and isprovided with hooks 30 for holding the pallet in place. These hooks oneach side of the mold are connected by a cross-bar 31 and are providedwith guide-pins 32. Springs 33 surround the guide-pins and normallyforce the hooks out of operative position. The cross-bar 31 is providedwith an arm 34, which is screwthreaded at the end, and a cam-nut 35 ismounted on this arm for moving the crossbar and forcing the hooks intointimate con- .tact'with the pallet, so as to hold the latter securelyto the mold.

I have shown-the mold as being provided with cores 36, movably-mountedand hav ng slots 37 for receiving cross-pins 38 to guide the cores andlimit their movement. I have also shown a plate 39 in the moldsurrounding the cores, the plate being provided with slots 40 forreceiving pins 41, similar to the pins 38. The pins 38 and 41 extendthrough the mold and hold the opposite sides thereof together inaddition to serving as guides for the core and press-plate 39. Thepress-plate may be considered as a part of the core and may have two ormore surfaces in different planes, in which case it is,properlyspeaklng, a core. The press-plate and the core are both providedwith skirts 36 and 39, which 22 is rigidly connected for inverting theextend normally to the rear of the mold, be-

yond the outer surface thereof. The skirts are of different lengths, sothat when a flat surface is brought against their projecting ends theywill be forced into the mold and assist in the compression of thematerial therein. On account of the different lengths of the skirts thecores 36 will be pressed into the mold a certain distance to the limitwhich is necessary in order to produce the desired configuration. Duringthis time the plate 39 is also forced into the mold; but on account ofits skirt projecting farther than the skirt 36 it will also have beenforced in before the movementof the cores 36 has commenced. This willprovide for a greater compression ofthe material between the press-plateand the other sideof. the mold than is given to that between the ends ofthe cores and the other sideof the mold. This is desirable on account ofthe greater thickness of material adjacent to the surfaces of the plate39. It will be noticed that-the slots 37 and 40 are parallel with eachother and that the latter are longer than the former, thus allowing thedifference in motion between the two elements described.

After the mold is filled and the pallet placed in position, as shown inFig. 2, the mold is tilted over into the position shown in Fig. 3 andpressure is applied through a press-head 42. This press-head is mountedto slide upon the bars 17, being guided thereby in an obvious manner.The press-head and one of the end heads 14 are pivotally con nected withlinks 43. .These links in turn are pivoted to a cross-head 44, whichslides vertically in a standard 45, having a vertical slot 46. Thecross-head is provided with a shaft 47, connected with a link 48, thatin turn is connected with an arm 49, mounted on a main shaft 50. Theoscillation of this shaft will operate the lever-toggle formed by thelink 48 and arm 49 to lift the crosshead 44 and act on the press-heads14 and 42 through the instrumentality of the toggles 43. It will thus beseen that a double toggle is provided for effecting the pressure on themolding material. After the molding operation is completed thepress-heads are moved back and themold inverted, so that the pallet ison the bottom.

I have provided means for removing the molded article from the mold,this means comprising a platform or skeleton frame 51, mounted on avertioally-sliding rod 52, op erating in bearings 53. A link 54 isconnected with the table or frame 51, and this in turn is connected witha bell-crank 55. This bell-crank has a handle 56, by means of which thetable canbe lifted. The table is located to move upwardly between a pairof rods 57, which constitute a skeleton frame for receiving the palletfrom the table when the table is lowered below it. These rods aresupported by a standard 58 and a crossbar 59 on two of the pillars 10.By the manipulation of the handle 56 the table can I be raised to theposition shown in dotted lines inFig. 3, and the pallet being releasedfrom the mold after the mold is turned over will rest on the table, andit can then be lowered, taking the molded article with it. As the tablemoves below the upper surfaces of the rods 57 the pallet will bedeposited on the latter and can be removed therefrom by any desired kindof a lifting device or by hand.

In the first four figures I have shown a le ver 60 on the shaft 50 foroperating the machine; but in Figs. 7 and 8 I have shown means foroperating the shaft by power, comprising a gear 61 on the shaft, apinion 62 meshing with the gear and mounted on a shaft 63, a disk 64,mounted on the shaft 63, and a second disk 65, engaging the disk 64, andtransmitting power thereto. The disk 65 is mounted on a counter-shaft66, which receives power from a pulley 67 or the like.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A molding-machine comprising a pair of heads, amovable press-head mounted between them, a toggle connecting saidmovable press-head with one of the first-mentioned heads, a cross-headconnected with said toggle, and a toggle for operating said cross-head.

2. A molding-machine comprising a pair of heads, a movable press-headmounted between them, a toggle connecting said movable press-head withone of the first-mentioned heads, a cross-head connected with saidtoggle, a toggle for operating said crosshead, a shaft with which onemember of the second toggle is rigidly connected, and means foroscillating the shaft. 1

3. In a molding-machine, the combination of a series'of pillars orsupports, chairs located on certain of said pillars, a rod supported byeach chair, a pair of bars supported by others of said pillars in aposition parallel to said rods, a head mounted on said 'rods, a secondhead movably mounted on said bars, means for forcing said second headaway from the first head, a third head adjustably mounted on the rods,and an invertible mold mounted between the second and third heads.

4. In a molding-machine, the combination of a series of pillars orsupports, chairs located on certain of said pillars, a rod supported byeach chair, a pair of bars supported by others of said pillars in aposition parallel to said rods, a head mounted on said rods, a secondhead movably mounted on said bars, means for forcing said second headaway from the first head,a third head adjustably mounted on the rods, aninvertible mold mounted between the second and third heads,

said mold being mounted on trunnions located off center to balance themold when filled with plastic material, and means on one of saidtrunnions for turning the mold.

5. In a molding-machine, the combinationof a frame having horizontalguides, a presshead movable along said guides, a mold mounted betweensaid guides and provided with trunnions, a plate for receiving saidtrunnions mounted on the guides, means on one of the trunnions forturning the mold about the trunnions as a center, and a stoppin for themold, said mold having recesses for receiving said stop-pin.

6. In a molding-machine, the combination of a frame having horizontalguides, a presshead movable along said guides, a mold mounted betweensaid guides and provided with trunnions, a plate for receiving saidtrunnions mounted on the guides, means on one of the trunnions forturning the mold about the trunnions as a center, and a stoppin for themold, said mold having recesses for receiving said stop-pin, saidrecesses being located at an angle of ninety degrees to each other toprovide for holding the mold in normal position, in inverted position,and on its side.

7. In a molding-machine, the combination of a mold provided withtrunnions, a plate for receiving and supporting said trunnions, means onone of the trunnions for turning the mold about the trunnions as acenter, and a stop-pin for the mold, said mold having recesses forreceiving said stop-pin, and the recesses being located at an angle ofninety degrees to each other with respect to the center of the trunnionin order to provide for holding the mold in normal position, in invertedposition, and on its side.

8. In a moldin -machine, the combination of a mold provi ed withtrunnions, a plate for supporting said trunnions, means for turning themold about the trunnions as a center, and a stop-pin for the mold, saidmold having recesses for receiving said stop-pin.

9. A molding-machine, comprising a mol havin trunnions and a circularledge on the end of the mold concentric with said trunnions and having aseries of recesses, and a stop-pin adapted to enter the recesses in saidledge for holding the mold in different positions.

10. A molding-machine, comprising a frame, a mold mounted on trunnionson said frame, a stop-pin for said mold, a circular ledge on the end ofthe mold concentric with said trunnions, said ledge having a series ofrecesses for receiving said stoppin, and a knee-lever for operating saidstop-pin.

11. A molding machine, comprising a frame, a mold mounted on trunnionson said frame, a stop-pin for said mold, and a circu-- lar ledge on theend of the mold concentric with said trunmons, said ledge having aseries of recesses for receiving said stop-pin, said mold being providedwith a movable core.

12. A molding-machine having an invertible mold provided with aplurality of core parts mounted to reciprocate different distances inthe mold.

13. A molding machine, comprising a mold having a core reciprocatinglymounted therein, and means for limiting the extent of reciprocation ofsaid core, a reciprocable press-plate for operating the said core, anmeans for limiting the motion of said pressplate, the latter meansgiving a greater latitude of motion than the former means.

14. A molding 'machine, comprising a mold having two bars, a core in themold having a slot through which one of said bars passes, and apress-plate having a slot through which the other bar passes, said barsserving as stops for limiting the motion of the core and press-plate.

15. A molding-machine, comprising a mold having two series of barsextending across it, a core in the mold having a slot through which oneof said bars passes, and a press-plate in the mold cooperating with thecore and having a slot through which the other bar asses, said secondslot being longer than the rst.

16. A molding machine, comprising a mold having two series of barsextending across it, a core in the mold having a slot through which oneof said bars passes, and a press-plate in the mold cooperating with thecore and having a slot through which the other bar passes, said secondslot being longer than the first, said slots being parallel with eachother.

17. A molding-machine having a mold provided with a core, and apress-plate, said core and press-plate each being provided witha skirtnormally extending beyond the rear side of the mold. p

18. Amolding-machine havingamold provided with a core, and apress-plate, said core and press-plate each being provided with a skirtnormally extending beyond the rear side of the mold, the skirt of thepress-plate extending farther from the surface of the mold than that ofthe core, the press-plate being provided with a perforation forreceiving the core.

19. In a molding-machine, the combination of a frame, a mold mountedthereon, means for inverting the mold, a reciprocable core and areciprocable press-plate in said mold, said press-plate having aperforation through which the core passes, and a latform adapted to bemoved under the mo d and to receive the molded article therefrom, thecore andpress-plate being adapted to descend a certain distance with themolded article as it is removed from the mold.

20. In a molding-machine, the combination of a mold, means on the moldfor holding ICC a pallet thereon, and means for releasing the pallet,comprising a hook movably mounted on the mold for engaging the pallet,resilient means for forcing the hook away from the pallet, and positivemeans for forcing the hook against the pallet.

21. In a molding-machine, the combination of an invertible mold, aplatform mount- A ed below said mold, means for raising the platform toa position adjacent to the bottom of the mold and for lowering theplatform from the mold, means on the mold for holding a pallet on thetop thereof, and means for releasing the pallet when the mold is in-.

Verted to deposit the pallet on said platform; said last-named meanscomprising a hook movably mounted on the mold for engaging the pallet, aspring for forcing the hook away from the pallet, and a cam for forcingthe hook against the pallet.

22. In a molding-machine, the combination of a movable mold, a platformmovably mounted below the mold, means for reciprocating the platformtoward and from the

